Well, the Japanese used to build better cars and VCRs, now they build better mice... http://www.foxnews.com/story/0,2933,316676,00.html
Of course one could argue that the mouses fear is a genetic memory passed down from mouse to mouse based on the decades of cats preying on mice that has embedded a fear of the cat smell in all mice. By messing with the nasal cells that made the mouse unable to recognise the smell of cats the fear goes away, because the fear of cats wasn't based on what the cat looked like but rather on the smell of cats. I mean its kinda like blinding someone and then being shocked they suddenly have no fear of polar bears and love to pet that huge wonderful dog.
I mean did they remove the actual fear or did they remove the mouses ability to associate the smell of cats with the memory that is still there that would trigger fear?
They removed the nasal cells used for "smelling" cats that triggered the response in their brains to fear the cats. They're saying since they removed this genetic trait, the mice didn't have anything to trigger their fear of cats.
